夏季北冰洋楚科奇海微微型、微型浮游植物和细菌的丰度分布特征及其与水团的关系  

SPATIAL DISTRIBUTION OF PICO-AND NANO-PHYTOPLANKTON AND BACTERIA IN THE CHUKCHI SEA WITH RELATION TO WATER MASSES

作　　者：张芳[1] 何剑锋[1] 郭超颖[1,2] 林凌[1,3] 马玉欣[1,4] 

机构地区：[1]国家海洋局极地科学重点实验室,中国极地研究中心,上海200136 [2]厦门大学海洋系,近海海洋环境科学国家重点实验室,福建厦门361005 [3]华东师范大学生命学院,上海200062 [4]同济大学环境科学与工程学院,上海200092

出　　处：《极地研究》2012年第3期238-246,共9页Chinese Journal of Polar Research

基　　金：国家自然科学基金(41076130,40576002);科技部国际合作司对欧盟科技合作专项经费项目(1105);国家海洋局青年海洋科学基金项目(2010116)资助

摘　　要：利用2008年中国第三次北极科学考察的机会,分析夏季楚科奇海微微型、微型浮游植物和细菌丰度的分布特征,并探讨它们与楚科奇海水团之间的关系。结果表明:与北冰洋的其他海域相比,楚科奇海的微型浮游植物丰度相对较高(0.03—10.23×103cells·mL-1),微微型浮游植物则大致相同(0.01—2.21×103cells·mL-1),而浮游细菌丰度明显较高(0.21—9.61×106cells·mL-1)。白令海陆架水与海冰融化混合水和阿纳德尔水浮游植物群落结构不同,夏季随着太平洋水入流水对楚科奇海的日益影响,其水体本身的群落结构可能被外来群落替代。Based on the Third Chinese Arctic Expedition cruise in the summer of 2008, the distribution patterns of pico-, nano-plankton and bacteria abundance in the Chukchi Sea were studied. Pico- and nano-phytoplankton abundances ranged from 0.01×103 to 5.51×103 cells/mL and from 0.01×103 to 5.51×103 cells/mL, respectively. The lowest numbers of bacteria in the entire water column was recorded at station R17 at 100 m depth （0.21×106 cells/mL）, and the highest concentration was observed at station R09 at 10 m depth （9.61×106 cells/mL）. Our results demonstrated that melting sea ice is affecting affects the physical characteristics of the Chukchi Sea by causing reductions in the salinity of the surface mixed layer, which in turn results in greater hydrodynamic stability of the water column. These changes were accompanied by increasing bacterial concentrations. The Pacific warm water brought high nutrients into the Chukchi Sea, which led to higher abundance of bacteria and nano-phytoplankton in the Chukchi Sea comparing to other regions of the Arctic Ocean. However, the number of picophytoplankton in the Anadyr Water with notably relation to chlorophyll a was larger than the other two water masses. The structure of pico- and nanoplankton communities coupled with the water masses in the Chukchi Sea was can be considered to act as asindicators of the variability the inflow of Pacific warm water into the Chukchi Sea.

关 键 词：北冰洋 楚科奇海 细菌 微微型浮游植物 微型浮游植物 

分 类 号：Q948.8[生物学—植物学]